Loops throw syntax error when in the REPL

[d3dc]

When the loop isn't closed on the same line, expect "Unexpected end of input" or "Unexpected }".

Loops are handled by the node repl by waiting for the syntax exception and then "recovering".

Can we do better? Can we eval while in the loop? Since we "compile" the code at runtime, we'll have to parse a bit.

[d3dc]

Only the repl "needs" this functionality

• Write a subclass of Script that can step through lines
  • create a private scope for each loop
  • eval loop code in private scope and restore the scope on exit
  • eval the completed loop when closed